In another thread I was asked to compare the SuperShape to the Metron B5. I waited a while to get enough days back to back to do a fair comparison.
My quiver:
Head SuperShape 170cm
Head iSL Chip 160cm
Atomic SL9 170cm
Atomic Metron B5 162cm
All of those ski well in hard snow but I tend to use the Metrons for offpiste days and one of the others for hard snow carving. I prefer the iSL for hyper carving (meaning I'm going to spend my day going for the biggest angles I can get). Its a terrific ski and probably my favorite for hard snow (it also works surprisingly well in crud, slush, and bumps). The SL9 is a nice ski with great edgehold and a reasonably soft flex. It hooks up and bends easily so its a great tool for working on reducing your turn radius via bending the ski. The SuperShape hooks up easily but its stiffer than the SL9 so it requires a bit more work for tighter turns. The SuperShape is 66mm under the foot so its a bit better than the SL9 in ungroomed snow.
The SuperShape and Metron B5 have a different focus in my quiver. The Metron would be my choice for a day I plan on being offpiste (I think of it as my lightning fast bulldozer). I'd take the SuperShape out if I know I'd be primarily on the groomed runs but planning on some offpiste thrown in. The Metron is 76mm under foot with 131mm at the tip. Its got ALOT of surface area so it handles deeps snow, crud, slush, and corn in a smoother fashion than the SuperShape (only 66mm under foot). I'm not saying you can't ski the SuperShape in those conditions (because you can), just that the Metron handles offpiste snow better. The SuperShape feels closer to the SL9 (64mm under foot) than to the Metron B5.
For the spring skiing I've been doing I like the iSL the best if morning temps are below 30. If its between 30-40 I go for the SuperShape or the SL9 depending on which is waxed. If its 40+ then I grab the Metrons (these skis just love spring corn).
For typical PNW winter skiing I'd probably grab the Metrons most of the time unless I was planning on focusing on drills or carving in which case I'd grab one of the others with no specific preference (although I'm leaning towards the iSL as my current favorite for carving).
All of those skis work very well with PMTS.